https://semarakilmu.com.my/index.php/journals en-US Semarak Ilmu Publishing https://semarakilmu.com.my/index.php/journals/article/view/1790 <div class="main_entry"> <section class="item abstract"> <p>A numerical study using computational fluid dynamics method with a single-phase approach has been presented in order to determine the effects of the concentration of nanoparticles and flow rate on the convective heat transfer and friction factor in turbulent regime flowing through a square duct with Reynolds number range of 10000 ? Re ? 1000000 using constant applied heat flux around the duct. The nanofluid used consisted of Fe3O4 magnetic nanoparticles with an average diameter of 13 nm dispersed in water with six volume fractions (0, 0.6, 0.8, 1, 1.5 and 2%). The results revealed that as volume fraction and Reynolds number increased, Nusselt number increased, and friction factor decreased as Reynolds number increased.</p> </section> </div> <div class="entry_details"> <div class="item galleys">&nbsp;</div> </div> M. R. Abdulwahab Copyright (c) 2022 Semarak Ilmu Publishing 2022-06-15 2022-06-15 https://semarakilmu.com.my/index.php/journals/article/view/1789 <div class="main_entry"> <section class="item abstract"> <p>A numerical 3-D simulation has been performed to investigate fluid flow and heat transfer characteristics of a film cooling injected through cylindrical and compound angle oriented holes with alignment angle of 30 degree adjacent to the end wall surface for a Pratt and Whitney gas turbine engine by ANSYS FLUENT 14.0. The results indicate that employing compound angle cooling holes injection gives much better protection to the components rather that obtained when simple angle cooling holes were used.</p> </section> </div> <div class="entry_details"> <div class="item galleys">&nbsp;</div> </div> S. Salimi A. Fazeli E. Kianpour Copyright (c) 2022 Semarak Ilmu Publishing 2022-06-15 2022-06-15